It's like this:
The resistivity of the silicon steel sheet itself is very high, but attention should be paid to it when placing it. The iron core is usually silicon-coated steel. insulating paint and with an insulating dielectric film. The silicon steel sheets are stacked together, and the plane of the silicon steel sheets is parallel to the magnetic field lines, so the silicon steel sheets simply intersect the path of the eddy current. The cross section of eddy currents in silicon steel sheets is reduced and the loop resistance increases. In addition, the silicon steel sheets mentioned above are The resistivity itself is very large, so the eddy current generated is small!
I hope this helps!
Bladeless wind turbines should be the newest type.
The principle behind Vortex's wind power generation is the effectKarman vortex in fluid dynamics, which refers to the fact that when a constant incoming flow bypasses certain objects under certain conditions, both sides of the object fall periodically. Double linear vortices with opposite directions of rotation and regular arrangement are produced after nonlinear action, a Karman vortex street is formed. For example, water flowing through the pillars of a bridge and wind blowing through towers, chimneys, cables, etc. will form Karman vortices. Once the vortices are large enough, they can cause the structure to oscillate. Vortex takes advantage of this aerodynamic instability to maximize oscillation and capture mechanical energy, then use this mechanical energy to generate electricity. Of course, the design of this device is completely different from that of a classic turbine. It mainly consists of a fixed mast, a generator anda hollow, lightweight, semi-rigid fiberglass cylinder on top. Vortex automatically changes stiffness and “synchronizes” with wind speed to maintain resonance without any mechanical or human intervention. The use of the vortex spill effect for wind power generation represents a technological leap forward in wind power that will produce power more efficiently, cheaper and more environmentally friendly. 'environment. The technology has attracted interest from Harvard University as well as SunEdison's TerraForm renewable energy division, Power, Inc. and Dat Venture.